HILLSDALE WWT - Secondary Wastewater Treatment Plant in Hillsdale, Oklahoma

HILLSDALE WWT is a municipal wastewater treatment facility located in Hillsdale, Garfield County, Oklahoma. Serving a small population of 101 residents, the plant provides secondary treatment for the community's wastewater. The facility is situated in a rural area of north-central Oklahoma, reflecting the scale of local infrastructure. The plant operates with secondary treatment, which is the minimum standard required under the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 37.85 cubic meters per day, the plant is sized appropriately for the small population it serves. As a US facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated wastewater is discharged into local water bodies that ultimately drain into the Arkansas River watershed, part of the Mississippi River basin. The plant's operation helps protect downstream aquatic ecosystems and supports the environmental health of the region's surface waters.

The plant discharges into local streams that flow into the Arkansas River, a major tributary of the Mississippi River. This watershed supports diverse aquatic life and provides water for agricultural and municipal use downstream. The plant's secondary treatment helps reduce nutrient and organic pollutant loads, contributing to the ecological health of the region's waterways.